How to read the band →
Solid line = floor (spellings that unambiguously belong to the group). Shaded band up to the dashed edge = ceiling (the most it could reach if every ambiguous spelling counted here).
Meredith
Meredith is now well below its former popularity. All-time it's been given to 82,044 U.S. babies, the 933rd most common name by sound today, peaking at 2,087 in 1980, with 656 in 2025.
Meredith has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).